LINCing Senescence and Nuclear Envelope Changes

Area of Science:

• Cell Biology
• Molecular Biology
• Gerontology

Background:

• The nuclear envelope (NE) is central to cellular organization, signaling, and survival.
• The NE undergoes significant alterations during senescence, a key cellular aging process.
• Lamin B1, an NE protein, is downregulated in senescence and serves as a senescence marker.

Purpose of the Study:

• To review the multifaceted roles of linker of nucleoskeleton and cytoskeleton (LINC) complex proteins in cellular senescence.
• To emphasize the importance of LINC complex proteins in processes beyond their structural function at the NE.
• To highlight LINC complex proteins as key players in senescence-associated nuclear changes.

Main Methods:

• Literature review focusing on NE proteins and senescence.
• Analysis of studies investigating LINC complex proteins and their functions.
• Synthesis of current research on LINC complex proteins in DNA repair, signaling, and nuclear shape.

Main Results:

• LINC complexes physically connect the cytoplasm and nucleoplasm, integrating mechanical signals.
• LINC complex proteins exist in various isoforms with nucleoplasmic and cytoplasmic roles.
• These proteins are implicated in DNA repair, cell signaling, and nuclear shape regulation, all relevant to senescence.

Conclusions:

• LINC complex proteins play critical, diverse roles in cellular senescence.
• Their functions extend beyond structural support to encompass essential cellular processes affected by aging.
• Understanding LINC complex proteins offers insights into senescence mechanisms and potential therapeutic targets.